APA (7th ed.) Citation

Rahardja, P., Purwanta, W., & Dumairy. Petunjuk Sukses OSN Bidang Ekonomi.

Chicago Style (17th ed.) Citation

Rahardja, Prathama, Wiji Purwanta, and Dumairy. Petunjuk Sukses OSN Bidang Ekonomi.

MLA (9th ed.) Citation

Rahardja, Prathama, et al. Petunjuk Sukses OSN Bidang Ekonomi.

Warning: These citations may not always be 100% accurate.