Gaya APA

Lepp, I. (-1969). The challenges of life, (transl. by C.White). - Mental health series, 12 : Magnisce des Desains. . Staten Islan NY: Alba House.

Gaya MLA

Lepp, I.. "The challenges of life, (transl. by C.White). - Mental health series, 12 : Magnisce des Desains. ". Staten Islan NY: Alba House, -1969. Buku.