Gaya APA

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

Gaya MLA

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