APA

Strebe (Matthew) ;Perkins (Charles), . (1999). Fire Walls. : .

Chicago

Strebe (Matthew) ;Perkins (Charles), . 1999. Fire Walls. : .

Harvard

Strebe (Matthew) ;Perkins (Charles), . (1999). Fire Walls. : .

MLA

Strebe (Matthew) ;Perkins (Charles), . Fire Walls. : . 1999.