APA (7th ed.) Citation

Ek, J. A. v., & Robat, N. J. (1984). The student's grammar of English. Blackwell.

Chicago Style (17th ed.) Citation

Ek, J. A. van, and Nico J. Robat. The Student's Grammar of English. Oxford: Blackwell, 1984.

MLA (9th ed.) Citation

Ek, J. A. van, and Nico J. Robat. The Student's Grammar of English. Blackwell, 1984.