APA (7. basım) Alıntı

Willoughby, D. A. (2005). Horizontal directional drilling: Utility and pipeline applications. McGraw-Hill.

Chicago Style (17. basım) Atıf

Willoughby, David A. Horizontal Directional Drilling: Utility and Pipeline Applications. New York: McGraw-Hill, 2005.

MLA (9th ed.) Atıf

Willoughby, David A. Horizontal Directional Drilling: Utility and Pipeline Applications. McGraw-Hill, 2005.