APA

Gerngross G., Puchta h., . (2006). Join Us for English. London: Eli.

Chicago

Gerngross Gunter, Puchta herbert, . 2006. Join Us for English. London: Eli.

Harvard

Gerngross G., Puchta h., . (2006). Join Us for English. London: Eli.

MLA

Gerngross Gunter, Puchta herbert, . Join Us for English. London: Eli. 2006.