APA (7th ed.) Citation

Contiki. (1982). The Who, what, how, where & when book of Europe (1982 ed.). Contiki.

Chicago Style (17th ed.) Citation

Contiki. The Who, What, How, Where & When Book of Europe. 1982 ed. London, Eng: Contiki, 1982.

MLA (9th ed.) Citation

Contiki. The Who, What, How, Where & When Book of Europe. 1982 ed. Contiki, 1982.