Gaya APA
Wolff, J, U. et al (1987).
Beginning Indonesian through self-instruction book 1 2 3 lesson 14-25 .
Jakarta:
Gramedia.
Gaya MLA
Wolff, John, U.. et al.
"Beginning Indonesian through self-instruction book 1 2 3 lesson 14-25".
Jakarta:
Gramedia,
1987.
Text.