Gaya APA
J., G., F., A., P., N. (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.