APA (7th ed.) Citation

Petrunkevitch, A. Tertiary spiders and Opilionids of North America. Connecticut Acad. of Arts and Sciences [u.a.].

Chicago Style (17th ed.) Citation

Petrunkevitch, Alexander. Tertiary Spiders and Opilionids of North America. New Haven, Conn: Connecticut Acad. of Arts and Sciences [u.a.].

MLA (9th ed.) Citation

Petrunkevitch, Alexander. Tertiary Spiders and Opilionids of North America. Connecticut Acad. of Arts and Sciences [u.a.].

Warning: These citations may not always be 100% accurate.