Παραπομπή σε μορφή APA (7η εκδ.)

Carrillo, R. C., & Contreras, J. P. Activities to improve the writing skill of the sixth level in the London English Institute.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Carrillo, Ritha Catalina, και Juan Pablo Contreras. Activities to Improve the Writing Skill of the Sixth Level in the London English Institute.

Παραπομπή σε μορφή MLA (8th εκδ.)

Carrillo, Ritha Catalina, και Juan Pablo Contreras. Activities to Improve the Writing Skill of the Sixth Level in the London English Institute.