APA (7th ed.) Citation

Zainal Abidin Yusof & Salmah Karim. Periodontologi.

Chicago Style (17th ed.) Citation

Zainal Abidin Yusof and Salmah Karim. Periodontologi.

MLA (9th ed.) Citation

Zainal Abidin Yusof and Salmah Karim. Periodontologi.

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