Gaya APA

Leather, M, M, ;, E. (1988). English proficiency for everyday living: an ESL workbook program book E . rhode island: P.A.R. incorporated educational publisher.

Gaya MLA

Leather, Mary, Mulvey, ;, Esmeria. "English proficiency for everyday living: an ESL workbook program book E". rhode island: P.A.R. incorporated educational publisher, 1988. Text.