Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Porter, Mary Winearls, y R. C. Spiller. The Barker Index of Crystals: A Method for the Identification of Crystallines Substances. Cambridge: Heffer, 1951.

Cita MLA (8a ed.)

Porter, Mary Winearls, y R. C. Spiller. The Barker Index of Crystals: A Method for the Identification of Crystallines Substances. Heffer, 1951.