Cita APA

CHRISTOPHERSEN, P. (1969). An advanced english grammar. Macmillan.

Citación estilo Chicago

CHRISTOPHERSEN, Paul. An Advanced English Grammar. London: Macmillan, 1969.

Cita MLA

CHRISTOPHERSEN, Paul. An Advanced English Grammar. Macmillan, 1969.

Warning: These citations may not always be 100% accurate.