توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Morris, P. (1974). A field guide to Pacific Coast shells, including shells of Hawaii and the Gulf of Califorinia: Percy A. Morris (2nd edition., revised and enlarged.). Houghton Mifflin Co.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Morris, Percy.A. A Field Guide to Pacific Coast Shells, Including Shells of Hawaii and the Gulf of Califorinia: Percy A. Morris. 2nd edition., revised and enlarged. Boston, Massachusetts: Houghton Mifflin Co, 1974.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Morris, Percy.A. A Field Guide to Pacific Coast Shells, Including Shells of Hawaii and the Gulf of Califorinia: Percy A. Morris. 2nd edition., revised and enlarged. Houghton Mifflin Co, 1974.