Erdos, P. L., & Morgan, A. J. (1970). Professional mail surveys. McGraw-Hill.
Chicago Style (17th ed.) CitationErdos, Paul L., and Arthur J. Morgan. Professional Mail Surveys. New York: McGraw-Hill, 1970.
ציטוט MLAErdos, Paul L., and Arthur J. Morgan. Professional Mail Surveys. McGraw-Hill, 1970.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.