Gaya APA
Purwanto, . et al (2002).
Succes Through Positive Thinking : Jalan spiritual berpikir posistif .
Bandung:
Nuansa Cendikia.
Gaya MLA
Purwanto, . et al.
"Succes Through Positive Thinking : Jalan spiritual berpikir posistif".
Bandung:
Nuansa Cendikia,
2002.
Text.