Allen, L. V., Popovich, N. G., & Ansel, H. C. (2005). Ansel's pharmaceutical dosage forms and drug delivery systems (8th ed.). Lippincott Williams & Wilkins ; Wolters Kluwer.

Allen, Loyd V., Nicholas G. Popovich, and Howard C. Ansel. Ansel's Pharmaceutical Dosage Forms and Drug Delivery Systems. 8th ed. Philadelphia : New Delhi: Lippincott Williams & Wilkins ; Wolters Kluwer, 2005.

Allen, Loyd V., et al. Ansel's Pharmaceutical Dosage Forms and Drug Delivery Systems. 8th ed. Lippincott Williams & Wilkins ; Wolters Kluwer, 2005.