Dyfyniad APA

(1978). Earth Sheltered Housing Design. Van Nostrand Reinhold Company.

Dyfyniad Arddull Chicago

Earth Sheltered Housing Design. Van Nostrand Reinhold Company, 1978.

Dyfyniad MLA

Earth Sheltered Housing Design. Van Nostrand Reinhold Company, 1978.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.