Gaya APA
Hesser, Dale T., Leach, Susan S.. (1987).
Focus On Earth Science: Review and Reinforcement Guide .
Columbus, Ohio:
Merrill Publishing Company..
Gaya Chicago
Hesser, Dale T., Leach, Susan S..
Focus On Earth Science: Review and Reinforcement Guide.
Columbus, Ohio:
Merrill Publishing Company.,
1987.
Text.
Gaya MLA
Hesser, Dale T., Leach, Susan S..
Focus On Earth Science: Review and Reinforcement Guide.
Columbus, Ohio:
Merrill Publishing Company.,
1987.
Text.
Gaya Turabian
Hesser, Dale T., Leach, Susan S..
Focus On Earth Science: Review and Reinforcement Guide.
Columbus, Ohio:
Merrill Publishing Company.,
1987.
Print.