APA

Herrera M., Hojel B., . (2009). Little pockets. London: pearson longman.

Chicago

Herrera Mario, Hojel Barbra, . 2009. Little pockets. London: pearson longman.

Harvard

Herrera M., Hojel B., . (2009). Little pockets. London: pearson longman.

MLA

Herrera Mario, Hojel Barbra, . Little pockets. London: pearson longman. 2009.