APA (7th ed.) Citation

Boutique, R., & Léonard, J. (1949). Notulae systematicae ([Sonderdr.].).

Chicago Style (17th ed.) Citation

Boutique, R., and Jean Léonard. Notulae Systematicae. [Sonderdr.]. Bruxelles, 1949.

MLA (9th ed.) Citation

Boutique, R., and Jean Léonard. Notulae Systematicae. [Sonderdr.]. 1949.

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