Παραπομπή APA

Bleeker, P. (1972). Papers on fishes V4: V4. Asher company.

Παραπομπή Chicago Style

Bleeker, Pieter. Papers on Fishes V4: V4. Amsterdam: Asher company, 1972.

Παραπομπή MLA

Bleeker, Pieter. Papers on Fishes V4: V4. Asher company, 1972.