APA

Hall D., . (2015). Keynote Proficient TB. : National Geografic Learning.

Chicago

Hall Diane, . 2015. Keynote Proficient TB. : National Geografic Learning.

Harvard

Hall D., . (2015). Keynote Proficient TB. : National Geografic Learning.

MLA

Hall Diane, . Keynote Proficient TB. : National Geografic Learning. 2015.