APA (7th ed.) Citation

Martindale, W., & Todd, R. G. (1967). Extra pharmacopoeia; incorporating "Squires Companion" (25th ed.). Pharmaceutical P..

Chicago Style (17th ed.) Citation

Martindale, William, and Robert Gibson Todd. Extra Pharmacopoeia; Incorporating "Squires Companion". 25th ed. London: Pharmaceutical P., 1967.

MLA (8th ed.) Citation

Martindale, William, and Robert Gibson Todd. Extra Pharmacopoeia; Incorporating "Squires Companion". 25th ed. Pharmaceutical P., 1967.