APA (7th ed.) Citation

Gordon, A. D. (1999). Classification (2. ed.). Chapman and Hall.

Chicago Style (17th ed.) Citation

Gordon, Allan D. Classification. 2. ed. Boca Raton u.a: Chapman and Hall, 1999.

MLA (9th ed.) Citation

Gordon, Allan D. Classification. 2. ed. Chapman and Hall, 1999.