APA (7th ed.) Citation

Poerba, R. (1977). Mari Membantu Orang lain. Firma Madju.

Chicago Style (17th ed.) Citation

Poerba, R.L.Tel. Mari Membantu Orang Lain. Firma Madju, 1977.

MLA (8th ed.) Citation

Poerba, R.L.Tel. Mari Membantu Orang Lain. Firma Madju, 1977.

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