Gaya APA

Lucantoni, P., Kellas, L. (2006). IGCSE English as a Second Language : Teacher's Book Second edition (Cet 2). United Kingdom: Cambridge University.

Gaya MLA

Lucantoni, Peter., Kellas, Lydia. "IGCSE English as a Second Language : Teacher's Book Second edition". Cet 2 United Kingdom: Cambridge University, 2006. Text.