APA način citiranja

Chavarría Arroyo, G. (2014). Difficulties faced by eighth grade students in the learning of linear equation problems at a high school in Heredia.

Čikaški stil citiranja

Chavarría Arroyo, Gilberto. Difficulties Faced By Eighth Grade Students in the Learning of Linear Equation Problems At a High School in Heredia. 2014.

MLA način citiranja

Chavarría Arroyo, Gilberto. Difficulties Faced By Eighth Grade Students in the Learning of Linear Equation Problems At a High School in Heredia. 2014.