APA (7th ed.) Citation

Harvald, S. A. (1950). Wake of merchant ships. Danish Technical Press.

Chicago Style (17th ed.) Citation

Harvald, Sv. Aa. Wake of Merchant Ships. Copenhagen: Danish Technical Press, 1950.

MLA (9th ed.) Citation

Harvald, Sv. Aa. Wake of Merchant Ships. Danish Technical Press, 1950.