Average monthly data from publisher's annual "Statement of Ownership, Management and Circulation", as compiled at The Comics Chronicles. Circulation data first included in Statements for 1960. Title became Captain America in early 1968.
Christiansen, Jeff (November 17, 2006). "Chondu the Mystic". The Appendix to the Handbook of the Marvel Universe. Archived from the original on April 9, 2013. Retrieved March 5, 2013.
Christiansen, Jeff (May 11, 2002). "Doctor Strange". The Appendix to the Handbook of the Marvel Universe. Archived from the original on March 4, 2013. Retrieved March 3, 2013.
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Christiansen, Jeff (November 17, 2006). "Chondu the Mystic". The Appendix to the Handbook of the Marvel Universe. Archived from the original on April 9, 2013. Retrieved March 5, 2013.
Christiansen, Jeff (May 11, 2002). "Doctor Strange". The Appendix to the Handbook of the Marvel Universe. Archived from the original on March 4, 2013. Retrieved March 3, 2013.