Paredes Obando, M. d. C., & Herrera Macias, L. M. (2017). Incidence of group techniques for improving the oral expression of english language.
Čikaški stil citiranja (17. izdanje)Paredes Obando, María del Carmen, i Luisa Maria Herrera Macias. Incidence of Group Techniques for Improving the Oral Expression of English Language. 2017.
MLA način citiranja (9. izdanje)Paredes Obando, María del Carmen, i Luisa Maria Herrera Macias. Incidence of Group Techniques for Improving the Oral Expression of English Language. 2017.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.