Gaya APA

Allen, L, V. et al (2011). Ansel's Pharmaceutical Dosage Forms And Drug Delivery Systems (9th.ed). Philadelphia: Lippincott Williams & Wilkins.

Gaya MLA

Allen, Loyd, V. et al. "Ansel's Pharmaceutical Dosage Forms And Drug Delivery Systems". 9th.ed Philadelphia: Lippincott Williams & Wilkins, 2011. Text.