APA-referens (7:e uppl.)

Watts, P. (1984). The potential for postbus development. Transport and Road Research Laboratory.

Chicago-referens (17:e uppl.)

Watts, P.F. The Potential for Postbus Development. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1984.

MLA-referens (9:e uppl.)

Watts, P.F. The Potential for Postbus Development. Transport and Road Research Laboratory, 1984.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.