Παραπομπή APA

Schlotfeldt, H. J. (1991). What should I do ?: A practical guide for the freshwater fish farmer. Germany: European Association of Fish Pathologists.

Παραπομπή Chicago Style

Schlotfeldt, H. J. What Should I Do ?: A Practical Guide for the Freshwater Fish Farmer. Germany: European Association of Fish Pathologists, 1991.

Παραπομπή MLA

Schlotfeldt, H. J. What Should I Do ?: A Practical Guide for the Freshwater Fish Farmer. Germany: European Association of Fish Pathologists, 1991.

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