APA aipamena

Hela, I., & Laevastu, T. (1961). Fisheries hydrograph. Fishing news.

Chicago Style aipamena

Hela, Ilmo, and Taivo Laevastu. Fisheries Hydrograph. London: Fishing news, 1961.

MLA aipamena

Hela, Ilmo, and Taivo Laevastu. Fisheries Hydrograph. Fishing news, 1961.