APA (7th ed.) Citation

Weismann, A. (1902). On germinal selection as a source of definite variation (2d ed.). The Open court publishing company.

Chicago Style (17th ed.) Citation

Weismann, August. On Germinal Selection as a Source of Definite Variation. 2d ed. Chicago: The Open court publishing company, 1902.

MLA (9th ed.) Citation

Weismann, August. On Germinal Selection as a Source of Definite Variation. 2d ed. The Open court publishing company, 1902.