एपीए उद्धरण

Wood, J. N. (1969). Cald wells screw tug design. Hutchinson.

शिकागो स्टाइल उद्धरण

Wood, Jeffrey N. Cald Wells Screw Tug Design. London: Hutchinson, 1969.

एमएलए उद्धरण

Wood, Jeffrey N. Cald Wells Screw Tug Design. Hutchinson, 1969.