Gaya APA

Gichaga, F, J., Parker, N, A. (1988). Essentials of highway engineering / Francis I. Gichaga, Neville A. Parker . London: Macmillan.

Gaya MLA

Gichaga, Francis, J.., Parker, Neville, A.. "Essentials of highway engineering / Francis I. Gichaga, Neville A. Parker". London: Macmillan, 1988. Textbook.