एपीए उद्धरण

(1997). Space science: The voice of America forrum lectures. Washington: VOA.

शिकागो स्टाइल उद्धरण

Space Science: The Voice of America Forrum Lectures. Washington: VOA, 1997.

एमएलए उद्धरण

Space Science: The Voice of America Forrum Lectures. Washington: VOA, 1997.