APA (7th ed.) Citation
(1984). Focus on earth science (5.vyd.). Charles E. Merrill Publishing Company.
Chicago Style (17th ed.) Citation
Focus on Earth Science. 5.vyd. Columbus: Charles E. Merrill Publishing Company, 1984.
MLA (9th ed.) Citation
Focus on Earth Science. 5.vyd. Charles E. Merrill Publishing Company, 1984.
Warning: These citations may not always be 100% accurate.