APA

Sapien (Mike) ;Piedmo (Greg), . (1997). Mastering Isdn. : .

Chicago

Sapien (Mike) ;Piedmo (Greg), . 1997. Mastering Isdn. : .

Harvard

Sapien (Mike) ;Piedmo (Greg), . (1997). Mastering Isdn. : .

MLA

Sapien (Mike) ;Piedmo (Greg), . Mastering Isdn. : . 1997.