APA

Hartmann P., . (1996). A reading skills book. México: McGraw-Hill.

Chicago

Hartmann Pamela, . 1996. A reading skills book. México: McGraw-Hill.

Harvard

Hartmann P., . (1996). A reading skills book. México: McGraw-Hill.

MLA

Hartmann Pamela, . A reading skills book. México: McGraw-Hill. 1996.