APA

Ellis M., O'Driscool N., . (1998). Giving presentations. : Longman.

Chicago

Ellis M, O'Driscool N, . 1998. Giving presentations. : Longman.

Harvard

Ellis M., O'Driscool N., . (1998). Giving presentations. : Longman.

MLA

Ellis M, O'Driscool N, . Giving presentations. : Longman. 1998.