APA

Trask, . (2005). How to write effective Emails. : Penguin books.

Chicago

Trask, . 2005. How to write effective Emails. : Penguin books.

Harvard

Trask, . (2005). How to write effective Emails. : Penguin books.

MLA

Trask, . How to write effective Emails. : Penguin books. 2005.