Παραπομπή APA

Gurney, R. (1933). British freshwater cope poda V3. Ray society.

Παραπομπή Chicago Style

Gurney, Robert. British Freshwater Cope Poda V3. London: Ray society, 1933.

Παραπομπή MLA

Gurney, Robert. British Freshwater Cope Poda V3. Ray society, 1933.