International Science School for High School Students, 11th, University of Sydney, 1968, Messel, H., & Butler, S. T. Man in inner and outer space; selected lectures on the U. S. manned moon landing programme, the sun, and our own planet. Pergamon Press, 1969.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रInternational Science School for High School Students, 11th, University of Sydney, 1968, Harry Messel, और Stuart Thomas Butler. Man in Inner and Outer Space; Selected Lectures on the U. S. Manned Moon Landing Programme, the Sun, and Our Own Planet. Oxford: Pergamon Press, 1969.
एमएलए (9वां संस्करण) प्रशस्ति पत्रInternational Science School for High School Students, 11th, University of Sydney, 1968, et al. Man in Inner and Outer Space; Selected Lectures on the U. S. Manned Moon Landing Programme, the Sun, and Our Own Planet. Pergamon Press, 1969.