APA

Roddy (Dennis); Coolen (John), . (1999). Electronic Communications. : .

Chicago

Roddy (Dennis); Coolen (John), . 1999. Electronic Communications. : .

Harvard

Roddy (Dennis); Coolen (John), . (1999). Electronic Communications. : .

MLA

Roddy (Dennis); Coolen (John), . Electronic Communications. : . 1999.