Gaya APA
Iskandar, A. (2017).
PRACTICAL PROBLEM SOLVING
step by step method for solving problems .
Yogyakarta:
Manggu Makmur Tanjung Lestar.
Gaya MLA
Iskandar, Andy.
"PRACTICAL PROBLEM SOLVING
step by step method for solving problems".
Yogyakarta:
Manggu Makmur Tanjung Lestar,
2017.
Text.