APA

Flechas J., Mergal M. Z., . (1980). Handbook of speech improvement for Spanish-speaking students. Río Piedras: Universidad de Puerto Rico, Editorial Universitaria.

Chicago

Flechas Jenaro, Mergal Margaret Z, . 1980. Handbook of speech improvement for Spanish-speaking students. Río Piedras: Universidad de Puerto Rico, Editorial Universitaria.

Harvard

Flechas J., Mergal M. Z., . (1980). Handbook of speech improvement for Spanish-speaking students. Río Piedras: Universidad de Puerto Rico, Editorial Universitaria.

MLA

Flechas Jenaro, Mergal Margaret Z, . Handbook of speech improvement for Spanish-speaking students. Río Piedras: Universidad de Puerto Rico, Editorial Universitaria. 1980.