APA (7th ed.) Citation

R. R, Robinson, R., & Lily, W. (1972). An English grammar. Scolar Press.

Chicago Style (17th ed.) Citation

R. R, Ralph Robinson, and William Lily. An English Grammar. Menston: Scolar Press, 1972.

MLA (8th ed.) Citation

R. R, et al. An English Grammar. Scolar Press, 1972.