APA (7e ed.) Bronvermelding

OBERG, J. E., & OBERG, A. R. (1986). Pioneering space: Living on the next frontier. McGraw-hill.

Chicago (17e ed.) Bronvermelding

OBERG, James E., en Alcestis R. OBERG. Pioneering Space: Living on the Next Frontier. New York: McGraw-hill, 1986.

MLA (9e ed.) Bronvermelding

OBERG, James E., en Alcestis R. OBERG. Pioneering Space: Living on the Next Frontier. McGraw-hill, 1986.