William A. Montevecchi: Systematics-Great Auk (Pinguinus impennis). [w:] The Birds of North America Online [on-line]. Cornell Lab of Ornithology, 1996. [dostęp 2010-04-29].
William A. Montevecchi & David A. Kirk: Characteristics-Great Auk (Pinguinus impennis). [w:] The Birds of North America Online [on-line]. Cornell Lab of Ornithology, 1996. [dostęp 2010-04-29].
William A. Montevecchi & David A. Kirk: Measurements-Great Auk (Pinguinus impennis). [w:] The Birds of North America Online [on-line]. Cornell Lab of Ornithology, 1996. [dostęp 2010-04-29].
William A. Montevecchi & David A. Kirk: Appearance-Great Auk (Pinguinus impennis). [w:] The Birds of North America Online [on-line]. Cornell Lab of Ornithology, 1996. [dostęp 2010-04-29].
William A. Montevecchi & David A. Kirk: Sounds-Great Auk (Pinguinus impennis). [w:] The Birds of North America Online [on-line]. Cornell Lab of Ornithology, 1996. [dostęp 2010-04-28].
William A. Montevecchi & David A. Kirk: Behavior-Great Auk (Pinguinus impennis). [w:] The Birds of North America Online [on-line]. Cornell Lab of Ornithology, 1996. [dostęp 2010-04-28].
William A. Montevecchi: Habitat-Great Auk (Pinguinus impennis). [w:] The Birds of North America Online [on-line]. Cornell Lab of Ornithology, 1996. [dostęp 2010-04-29].
William A. Montevecchi: Great Auk (Pinguinus impennis). [w:] The Birds of North America Online [on-line]. Cornell Lab of Ornithology, 1996. [dostęp 2010-04-28].
William A. Montevecchi & David A. Kirk: Migration-Great Auk (Pinguinus impennis). [w:] The Birds of North America Online [on-line]. Cornell Lab of Ornithology, 1996. [dostęp 2010-04-29].
William A. Montevecchi & David A. Kirk: Food Habits-Great Auk (Pinguinus impennis). [w:] The Birds of North America Online [on-line]. Cornell Lab of Ornithology, 1996. [dostęp 2010-04-29].
William A. Montevecchi & David A. Kirk: Breeding-Great Auk (Pinguinus impennis). [w:] The Birds of North America Online [on-line]. Cornell Lab of Ornithology, 1996. [dostęp 2010-04-29].
William A. Montevecchi & David A. Kirk: Demography-Great Auk (Pinguinus impennis). [w:] The Birds of North America Online [on-line]. Cornell Lab of Ornithology, 1996. [dostęp 2010-04-29].
William A. Montevecchi & David A. Kirk: Conservation-Great Auk (Pinguinus impennis). [w:] The Birds of North America Online [on-line]. Cornell Lab of Ornithology, 1996. [dostęp 2010-04-29].
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