Gaya APA
Singer, K., Sitorus, B. (1987).
Membina hasrat belajar di sekolah/ Kurt Singer ; pent.Bergman Sitorus .
Bandung:
Remaja Rosdakarya.
Gaya MLA
Singer, Kurt., Sitorus, Bergman.
"Membina hasrat belajar di sekolah/ Kurt Singer ; pent.Bergman Sitorus".
Bandung:
Remaja Rosdakarya,
1987.
Text.