Helms R. A. ., Herfindal E. T., . (2006). Textbook of Therapeutics, Drug and Disease Management. New Delhi: Lippincott Williams & Wilkins.
Helms R A, Herfindal Eric T, . 2006. Textbook of Therapeutics, Drug and Disease Management. New Delhi: Lippincott Williams & Wilkins.
Helms R A, Herfindal Eric T, . Textbook of Therapeutics, Drug and Disease Management. New Delhi: Lippincott Williams & Wilkins. 2006.