Cita APA (7a ed.)

Van Impe, W. F. (1989). Soil improvement techniques and their evolution. Balkena.

Cita Chicago Style (17a ed.)

Van Impe, W. F. Soil Improvement Techniques and Their Evolution. Rotterdam: Balkena, 1989.

Cita MLA (8a ed.)

Van Impe, W. F. Soil Improvement Techniques and Their Evolution. Balkena, 1989.