Gaya APA

HARBECK, R, M., JOHNSON, L, K. (1965). EARTH AND SPACE SCIENCE . United States of America: HOLT, RINEHART AND WINSTON.

Gaya MLA

HARBECK, RICHARD, M.., JOHNSON, LOLYD, K.. "EARTH AND SPACE SCIENCE". United States of America: HOLT, RINEHART AND WINSTON, 1965. Text.