APA-viite

Szafran, R. F. (2012). Answering questions with statistics. Sage Publications, Inc.

Chicago-tyylinen lähdeviittaus

Szafran, Robert F. Answering Questions with Statistics. Thousand Oaks: Sage Publications, Inc, 2012.

MLA-viite

Szafran, Robert F. Answering Questions with Statistics. Sage Publications, Inc, 2012.