APA (7th ed.) Citation

(1982). Observer's handbook (4th ed.). H.M.S.O.

Chicago Style (17th ed.) Citation

Observer's Handbook. 4th ed. London: H.M.S.O, 1982.

MLA (9th ed.) Citation

Observer's Handbook. 4th ed. H.M.S.O, 1982.

Warning: These citations may not always be 100% accurate.