Gaya APA
Shaffar, H, M, E.
(1990).
Takut Kenapa Takut
.
Jakarta:
Gema Insani Press.
Gaya MLA
Shaffar, Hasan, Musa, Es.
"Takut Kenapa Takut".
Jakarta:
Gema Insani Press,
1990.
Textbook.