APA

Vari R. P., . (1989). Systematics of the Neotropical Characiform genus Psectrogaster Eigenmann and Eigenmann (Pisces: Characiformes). Washington: Smithsonian Institution Press.

Chicago

Vari Richard P, . 1989. Systematics of the Neotropical Characiform genus Psectrogaster Eigenmann and Eigenmann (Pisces: Characiformes). Washington: Smithsonian Institution Press.

Harvard

Vari R. P., . (1989). Systematics of the Neotropical Characiform genus Psectrogaster Eigenmann and Eigenmann (Pisces: Characiformes). Washington: Smithsonian Institution Press.

MLA

Vari Richard P, . Systematics of the Neotropical Characiform genus Psectrogaster Eigenmann and Eigenmann (Pisces: Characiformes). Washington: Smithsonian Institution Press. 1989.