Gaya APA
Muhyidin, M., Sudjatna, A, S. (2010).
Melawan pikiran negatif (the black or negative thingking) .
Gorontalo:
Diva Press.
Gaya MLA
Muhyidin, Muhammad., Sudjatna, A., S..
"Melawan pikiran negatif (the black or negative thingking)".
Gorontalo:
Diva Press,
2010.
Text.