Παραπομπή APA

Sowers, G. B., & Sowers, G. F. (1958). Introductory soil mechanics and foundations.

Παραπομπή Chicago Style

Sowers, George B., και George F. Sowers. Introductory Soil Mechanics and Foundations. 1958.

Παραπομπή MLA

Sowers, George B., και George F. Sowers. Introductory Soil Mechanics and Foundations. 1958.