APA (7th ed.) Citation

Porter, M. W., & Spiller, R. C. (1951). The Barker index of crystals: A method for the identification of crystalline substances. Published for the Barker Index Committee by W. Heffer.

Chicago Style (17th ed.) Citation

Porter, Mary Winearls, and Reginald Charles Spiller. The Barker Index of Crystals: A Method for the Identification of Crystalline Substances. Cambridge [England]: Published for the Barker Index Committee by W. Heffer, 1951.

MLA (9th ed.) Citation

Porter, Mary Winearls, and Reginald Charles Spiller. The Barker Index of Crystals: A Method for the Identification of Crystalline Substances. Published for the Barker Index Committee by W. Heffer, 1951.