APA (7th ed.) Citation

Frey, H. (1983). The freshwater aquarium. Orbis Publishing.

Chicago Style (17th ed.) Citation

Frey, Hans. The Freshwater Aquarium. London: Orbis Publishing, 1983.

MLA (9th ed.) Citation

Frey, Hans. The Freshwater Aquarium. Orbis Publishing, 1983.

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