Gaya APA
Varley, Helen. (1989).
The Flier's Handbook : the travellers complete guide to airports, aircraft and air travel .
New York:
Pan Books.
Gaya Chicago
Varley, Helen.
The Flier's Handbook : the travellers complete guide to airports, aircraft and air travel.
New York:
Pan Books,
1989.
Referensi.
Gaya MLA
Varley, Helen.
The Flier's Handbook : the travellers complete guide to airports, aircraft and air travel.
New York:
Pan Books,
1989.
Referensi.
Gaya Turabian
Varley, Helen.
The Flier's Handbook : the travellers complete guide to airports, aircraft and air travel.
New York:
Pan Books,
1989.
Referensi.