Cita APA (7th ed.)

SEIDL, J. (1981). Grammar in practice 1. Oxford University Press.

Cita Chicago (17th ed.)

SEIDL, Jennifer. Grammar in Practice 1. Toronto: Oxford University Press, 1981.

Cita MLA (9th ed.)

SEIDL, Jennifer. Grammar in Practice 1. Oxford University Press, 1981.