APA-referens (7:e uppl.)

(1978). Symbols for tourist guides, maps, and country side recreation. [London] : British Tourist Anthority.

Chicago-referens (17:e uppl.)

Symbols for Tourist Guides, Maps, and Country Side Recreation. [London] : British Tourist Anthority, 1978.

MLA-referens (9:e uppl.)

Symbols for Tourist Guides, Maps, and Country Side Recreation. [London] : British Tourist Anthority, 1978.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.