Παραπομπή APA

Blyth, F. G. H., & Freitas, M. H. d. (2006). Geology for engineers (7th ed.). Butterworth Heinemann.

Παραπομπή Chicago Style

Blyth, F. G. H., και M. H. de Freitas. Geology for Engineers. 7th ed. Oxford: Butterworth Heinemann, 2006.

Παραπομπή MLA

Blyth, F. G. H., και M. H. de Freitas. Geology for Engineers. 7th ed. Butterworth Heinemann, 2006.