Cita APA (7th ed.)

Kirn, E., & Hartmann, P. (1990). Interactions I. A reading skills book (2a. ed.). McGraw Hill.

Cita Chicago (17th ed.)

Kirn, Elaine, i Pamela Hartmann. Interactions I. A Reading Skills Book. 2a. ed. Nueva York: McGraw Hill, 1990.

Cita MLA (9th ed.)

Kirn, Elaine, i Pamela Hartmann. Interactions I. A Reading Skills Book. 2a. ed. McGraw Hill, 1990.