Gaya APA
Economics Of Transportation. (1971).
Illinois:
Richard D Irwin, Inc.
Gaya Chicago
Economics Of Transportation.
Ed. 6.
Illinois:
Richard D Irwin, Inc,
1971.
.
Gaya MLA
Economics Of Transportation.
Ed. 6.
Illinois:
Richard D Irwin, Inc,
1971.
.
Gaya Turabian
Economics Of Transportation.
Illinois:
Richard D Irwin, Inc,
1971.
.