Gaya APA
PEGRUM, D, F.
(1968).
Transportation:
(
Rev. ed.)
.
Homewood, Illinois:
Ricard D. Irwin.
Gaya MLA
PEGRUM, Dudley, F..
"Transportation:".
Rev. ed.
Homewood, Illinois:
Ricard D. Irwin,
1968.
Buku.