Παραπομπή APA

Cushing, D. . H. Uses of echo sounding for fishermen. Her Majesty stationery office.

Παραπομπή Chicago Style

Cushing, D H. Uses of Echo Sounding for Fishermen. London: Her Majesty stationery office.

Παραπομπή MLA

Cushing, D H. Uses of Echo Sounding for Fishermen. Her Majesty stationery office.