Harrap, Geoffrey, G., & McInerny, D. (1989). All about tropical fish (4η έκδοση.). Harrap.
Chicago Style (17th ed.) CitationHarrap, Gerard Geoffrey, and Derek McInerny. All About Tropical Fish. 4η έκδοση. London: Harrap, 1989.
MLA (8th ed.) CitationHarrap, et al. All About Tropical Fish. 4η έκδοση. Harrap, 1989.
Warning: These citations may not always be 100% accurate.