Cita APA (7a ed.)

Willis, E. J. (1921). The mathematics of navigation. J.W. Fergusson & Sons.

Cita Chicago Style (17a ed.)

Willis, Edward J. The Mathematics of Navigation. Richmond: J.W. Fergusson & Sons, 1921.

Cita MLA (9a ed.)

Willis, Edward J. The Mathematics of Navigation. J.W. Fergusson & Sons, 1921.