Dunlap, David W. Final Pan Am Departure. The New York Times. September 4, 1992 [July 27, 2017]. （原始内容存档于2020-12-11）.引用错误：带有name属性“FinalPanAmDeparture”的<ref>标签用不同内容定义了多次
Schneider, Daniel B. "F.Y.I." （页面存档备份，存于互联网档案馆） The New York Times, July 25, 1999. Accessed September 30, 2007. "Q. Back in the 1960s and 1970s, helicopters bound for Kennedy International Airport used to take off from a deck atop the old Pan Am Building. Why was the service halted? A. As many as 360 helicopter flights a day were planned by New York Airways after the 59-story Pan Am building was completed in 1963, but a bitter public outcry delayed the first few flights until Dec. 21, 1965.... The operation proved unprofitable, however, since the helicopters carried an average of only eight passengers, and the heliport, which had cost $1 million to build, closed in 1968.... After another round of hearings—and renewed protests—flights resumed in February 1977. Three months later, the landing gear on one of the Sikorsky S-61 helicopters collapsed while passengers were boarding, flipping it on its side and sending a 20-foot rotor blade skidding across the roof and over the west parapet wall. Within hours, the heliport was closed indefinitely."
Schneider, Daniel B. "F.Y.I.", The New York Times, January 5, 1997. Accessed September 30, 2007. "Q. I recall that it was 1963 when the huge Pan Am letters were put atop what is now the Met Life building and that it was 1992 when they were taken down.... A. Most of the letters and the accompanying logos did not survive removal; exceptions are in warehouses.... The letters, each about 15英尺（4.6米） tall, and the logos—25-英尺（7.6-米）-wide globes—had to be cut into sections and pulled up onto the roof by technicians from Universal Unlimited, who built and installed their replacements, the Met Life signs."
Horsley, Carter C. The MetLife Building （页面存档备份，存于互联网档案馆）, The Midtown Book. Accessed September 30, 2007. "When it was completed, the 2,400,000 sq ft（220,000 m2） building became the world's largest office building in bulk, a title it would lose a few years later to 55 Water Street downtown."
Horsley, Carter C. The MetLife Building （页面存档备份，存于互联网档案馆）, The Midtown Book. Accessed September 30, 2007. "When it was completed, the 2,400,000 sq ft（220,000 m2） building became the world's largest office building in bulk, a title it would lose a few years later to 55 Water Street downtown."
Dunlap, David W. Final Pan Am Departure. The New York Times. September 4, 1992 [July 27, 2017]. （原始内容存档于2020-12-11）.引用错误：带有name属性“FinalPanAmDeparture”的<ref>标签用不同内容定义了多次
Schneider, Daniel B. "F.Y.I." （页面存档备份，存于互联网档案馆） The New York Times, July 25, 1999. Accessed September 30, 2007. "Q. Back in the 1960s and 1970s, helicopters bound for Kennedy International Airport used to take off from a deck atop the old Pan Am Building. Why was the service halted? A. As many as 360 helicopter flights a day were planned by New York Airways after the 59-story Pan Am building was completed in 1963, but a bitter public outcry delayed the first few flights until Dec. 21, 1965.... The operation proved unprofitable, however, since the helicopters carried an average of only eight passengers, and the heliport, which had cost $1 million to build, closed in 1968.... After another round of hearings—and renewed protests—flights resumed in February 1977. Three months later, the landing gear on one of the Sikorsky S-61 helicopters collapsed while passengers were boarding, flipping it on its side and sending a 20-foot rotor blade skidding across the roof and over the west parapet wall. Within hours, the heliport was closed indefinitely."
