APA (7th ed.) Citation

Treble, H. A., & Vallins, G. H. (1936). An A.B.C. of English usage. At the Clarendon Press.

Chicago Style (17th ed.) Citation

Treble, H. A., and George Henry Vallins. An A.B.C. of English Usage. Oxford: At the Clarendon Press, 1936.

MLA (9th ed.) Citation

Treble, H. A., and George Henry Vallins. An A.B.C. of English Usage. At the Clarendon Press, 1936.