APA (7th ed.) Citation

Grabau, A. W. The world we live in: A new interpretation of earth history.

Chicago Style (17th ed.) Citation

Grabau, Amadeus W. The World We Live in: A New Interpretation of Earth History.

MLA (9th ed.) Citation

Grabau, Amadeus W. The World We Live in: A New Interpretation of Earth History.

Warning: These citations may not always be 100% accurate.