APA (7th ed.) Citation

Swarth, H. S. (1910). Two new owls from Arizona: With description of the juvenal plumage of Strix occidentalis occidentalis (Xantus). The University press.

Chicago Style (17th ed.) Citation

Swarth, Harry S. Two New Owls from Arizona: With Description of the Juvenal Plumage of Strix Occidentalis Occidentalis (Xantus). Berkeley: The University press, 1910.

MLA (9th ed.) Citation

Swarth, Harry S. Two New Owls from Arizona: With Description of the Juvenal Plumage of Strix Occidentalis Occidentalis (Xantus). The University press, 1910.