एपीए उद्धरण

Penn, W. S. (1966). Grp technology: :handbook to the polyster/ glass fibre plastic industry. Maclaren.

शिकागो स्टाइल उद्धरण

Penn, W S. Grp Technology: :handbook to the Polyster/ Glass Fibre Plastic Industry. London: Maclaren, 1966.

एमएलए उद्धरण

Penn, W S. Grp Technology: :handbook to the Polyster/ Glass Fibre Plastic Industry. Maclaren, 1966.