Dyfyniad APA

(1978). Japan petroleum and energy yearbook. Tokyo: Japan Petroleum Consultants.

Dyfyniad Arddull Chicago

Japan Petroleum and Energy Yearbook. Tokyo: Japan Petroleum Consultants, 1978.

Dyfyniad MLA

Japan Petroleum and Energy Yearbook. Tokyo: Japan Petroleum Consultants, 1978.

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