Gaya APA

Havemann, E., Lehtinen, M. (1986). Marriages & Families New Problems, New Opportunities . New Jersey: Prentice Hall.

Gaya MLA

Havemann, Ernest., Lehtinen, Marlene. "Marriages & Families New Problems, New Opportunities". New Jersey: Prentice Hall, 1986. BUKU GEOGRAFI.