Cita APA (7th ed.)

Packard, W. V. (1981). Voyage estimating (2a. ed.). Fairplay Publications.

Cita Chicago (17th ed.)

Packard, William V. Voyage Estimating. 2a. ed. Londres: Fairplay Publications, 1981.

Cita MLA (9th ed.)

Packard, William V. Voyage Estimating. 2a. ed. Fairplay Publications, 1981.