APA (7th ed.) Zitazioa

(1993). Century 21 keyboarding, formatting, and document processing / Jerry W. Robinson ... [et al.].

Chicago Style (17th ed.) Zitazioa

Century 21 Keyboarding, Formatting, and Document Processing / Jerry W. Robinson ... [et Al.]. 1993.

MLA (9th ed.) Zitazioa

Century 21 Keyboarding, Formatting, and Document Processing / Jerry W. Robinson ... [et Al.]. 1993.