Dyfyniad APA

Brown, E. . E., & Gratzek, J. B. (1980). Fish farming hand book. AVI Publishing.

Dyfyniad Arddull Chicago

Brown, E Evan, and John B. Gratzek. Fish Farming Hand Book. Connecticut: AVI Publishing, 1980.

Dyfyniad MLA

Brown, E Evan, and John B. Gratzek. Fish Farming Hand Book. AVI Publishing, 1980.

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