APA (7e ed.) Bronvermelding

Sparling, A. B., & Attridge, C. M. (1975). Complete course in office procedures. McGraw-Hill.

Chicago (17e ed.) Bronvermelding

Sparling, Allan B., en Catherine M. Attridge. Complete Course in Office Procedures. Toronto: McGraw-Hill, 1975.

MLA (9e ed.) Bronvermelding

Sparling, Allan B., en Catherine M. Attridge. Complete Course in Office Procedures. McGraw-Hill, 1975.