APA (7th ed.) Citation

Beckinsale, R. P. (1966). Land, air and ocean (4a. ed.). Gerald Duckworth.

Chicago Style (17th ed.) Citation

Beckinsale, R. P. Land, Air and Ocean. 4a. ed. Londres: Gerald Duckworth, 1966.

MLA (9th ed.) Citation

Beckinsale, R. P. Land, Air and Ocean. 4a. ed. Gerald Duckworth, 1966.