Gaya APA
Thomas, J.A.G.. (1977).
An Introduction to geological maps (2nd ed).
Boston:
George Allen and Unwin.
Gaya Chicago
Thomas, J.A.G..
An Introduction to geological maps.
2nd ed
Boston:
George Allen and Unwin,
1977.
Text.
Gaya MLA
Thomas, J.A.G..
An Introduction to geological maps.
2nd ed
Boston:
George Allen and Unwin,
1977.
Text.
Gaya Turabian
Thomas, J.A.G..
An Introduction to geological maps.
2nd ed
Boston:
George Allen and Unwin,
1977.
Print.