Mac OS X Leopard – Technology – UNIX. [w:] Leopard Technology Overview [on-line]. Apple. [dostęp 2007-10-26]. Cytat: Leopard is now an Open Brand UNIX 03 Registered Product, conforming to the SUSv3 and POSIX 1003.1 specifications for the C API, Shell Utilities, and Threads.
Trademark #78257226 for Panther, #78269988 for Tiger, #78270003 for Leopard, #78271630 for Cougar and #78271639 for Lynx, all registered in 2004 by Apple Computer, Inc.United States Patent and Trademark Office. [dostęp 2006-12-20]. [zarchiwizowane z tego adresu (2006-12-20)].
web.archive.org
Trademark #78257226 for Panther, #78269988 for Tiger, #78270003 for Leopard, #78271630 for Cougar and #78271639 for Lynx, all registered in 2004 by Apple Computer, Inc.United States Patent and Trademark Office. [dostęp 2006-12-20]. [zarchiwizowane z tego adresu (2006-12-20)].
Makefile. Apple, June 2005. [dostęp 2008-12-15]. [zarchiwizowane z tego adresu (2009-01-14)]. Cytat: RC Release is Kodiak (Public Beta)
Nazwę puma można znaleźć tutaj: Cross-Development. Apple, 2006-11-11. [dostęp 2006-12-20]. [zarchiwizowane z tego adresu (2007-05-20)].