Cita APA (7a ed.)

Farrell, A., & Noble, A. (1993). Einfach Klasse! (Rev. and updated, 1. publ., reprint. (with amendments).). Oxford Univ. Press.

Cita Chicago Style (17a ed.)

Farrell, Anne, y Alison Noble. Einfach Klasse! Rev. and updated, 1. publ., reprint. (with amendments). Oxford [u.a.]: Oxford Univ. Press, 1993.

Cita MLA (9a ed.)

Farrell, Anne, y Alison Noble. Einfach Klasse! Rev. and updated, 1. publ., reprint. (with amendments). Oxford Univ. Press, 1993.