APA (7e ed.) Bronvermelding

Vik, G. N., Wilkinson, C. W., & Wilkinson, D. C. (1990). Writing and speaking in business (10th ed.). Irwin.

Chicago (17e ed.) Bronvermelding

Vik, Gretchen N., Clyde W. Wilkinson, en Dorothy C. Wilkinson. Writing and Speaking in Business. 10th ed. Homewood, Ill: Irwin, 1990.

MLA (9e ed.) Bronvermelding

Vik, Gretchen N., et al. Writing and Speaking in Business. 10th ed. Irwin, 1990.