NOAA Diving Program (U.S.) (28 Feb 2001). Joiner, James T. (ed.). NOAA Diving Manual, Diving for Science and Technology (4th ed.). Silver Spring, Maryland: National Oceanic and Atmospheric Administration, Office of Oceanic and Atmospheric Research, National Undersea Research Program. ISBN978-0-941332-70-5. CD-ROM prepared and distributed by the National Technical Information Service (NTIS) in partnership with NOAA and Best Publishing Company
Staff (4 March 2014). "CMAS Self-Rescue Diver". Standard Number: 2.B.31 / BOD no 181 ( 04-18-2013 ). CMAS. Archived from the original on 14 April 2017. Retrieved 13 April 2017.
cnsonline.com.tw
CNS 12497: 潛水鏡. Diving mask. Bureau of Standards, Metrology and Inspection, Republic of China. Archived from the original on 2023-05-21. Retrieved 2019-07-23. Preview available at cnsonline.com.tw
Gronfeldt, Thomas (11 November 2016). "Gear Review: The Buddy-Watcher". scubadiverlife.com. Archived from the original on 26 October 2017. Retrieved 25 October 2017.
Gronfeldt, Thomas (11 November 2016). "Gear Review: The Buddy-Watcher". scubadiverlife.com. Archived from the original on 26 October 2017. Retrieved 25 October 2017.
Staff (4 March 2014). "CMAS Self-Rescue Diver". Standard Number: 2.B.31 / BOD no 181 ( 04-18-2013 ). CMAS. Archived from the original on 14 April 2017. Retrieved 13 April 2017.
CNS 12497: 潛水鏡. Diving mask. Bureau of Standards, Metrology and Inspection, Republic of China. Archived from the original on 2023-05-21. Retrieved 2019-07-23. Preview available at cnsonline.com.tw