Cita APA (7th ed.)

Varley, M. E. (1967). British freshwater fishes: Factors affecting their distribution. Fishing News Books.

Cita Chicago (17th ed.)

Varley, Margaret E. British Freshwater Fishes: Factors Affecting Their Distribution. Londres: Fishing News Books, 1967.

Cita MLA (9th ed.)

Varley, Margaret E. British Freshwater Fishes: Factors Affecting Their Distribution. Fishing News Books, 1967.