Cita APA (7th ed.)

Kirn, E., & Jack, D. (1990). Interactions I. A communicative grammar (2a. ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Kirn, Elaine, i Darcy Jack. Interactions I. A Communicative Grammar. 2a. ed. Nueva York: McGraw-Hill, 1990.

Cita MLA (9th ed.)

Kirn, Elaine, i Darcy Jack. Interactions I. A Communicative Grammar. 2a. ed. McGraw-Hill, 1990.