APA
Treble H. A. V. G. H., . (1926). Gateway to English; book 1. London: Oxford University Press.
Chicago
Treble H A Vallins G H, . 1926. Gateway to English; book 1. London: Oxford University Press.
Harvard
Treble H. A. V. G. H., . (1926). Gateway to English; book 1. London: Oxford University Press.
MLA
Treble H A Vallins G H, . Gateway to English; book 1. London: Oxford University Press. 1926.