Dyfyniad APA

Griffiths, B. (1975). Invisible barriers to invisible trade. New York: Holmes & Meier publisher.

Dyfyniad Arddull Chicago

Griffiths, Brian. Invisible Barriers to Invisible Trade. New York: Holmes & Meier publisher, 1975.

Dyfyniad MLA

Griffiths, Brian. Invisible Barriers to Invisible Trade. New York: Holmes & Meier publisher, 1975.

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