APA aipamena

Erdos, P. L., & Morgan, A. J. (1970). Professional mail surveys. McGraw-Hill.

Chicago Style aipamena

Erdos, Paul L., and Arthur J. Morgan. Professional Mail Surveys. New York: McGraw-Hill, 1970.

MLA aipamena

Erdos, Paul L., and Arthur J. Morgan. Professional Mail Surveys. McGraw-Hill, 1970.