Butler, R. N. (1977). Sex after sixty: A guide for men and women for their later years. Hall.
Chicago-Zitierstil (17. Ausg.)Butler, Robert N. Sex After Sixty: A Guide for Men and Women for Their Later Years. Boston: Hall, 1977.
MLA-Zitierstil (9. Ausg.)Butler, Robert N. Sex After Sixty: A Guide for Men and Women for Their Later Years. Hall, 1977.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.