Gaya APA

Bradburn, N. (2004). Asking Questions: The Definitive Guide to Questionnairie Design-For Market Research, Political Polls and Social and Health Questionnairies (1). San Francisco: Jossey-Bass Inc..

Gaya MLA

Bradburn, Norman. "Asking Questions: The Definitive Guide to Questionnairie Design-For Market Research, Political Polls and Social and Health Questionnairies". 1 San Francisco: Jossey-Bass Inc., 2004. MPK.