Cita APA (7th ed.)

GREENLAW, M., & BARTON, G. (1972). Stepping stones. Harper and Row.

Cita Chicago (17th ed.)

GREENLAW, M.Jean, i Gretchen BARTON. Stepping Stones. New York: Harper and Row, 1972.

Cita MLA (9th ed.)

GREENLAW, M.Jean, i Gretchen BARTON. Stepping Stones. Harper and Row, 1972.