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Citação do estilo Chicago (17ª ed.)Royal Photographic Society of Great Britain. Imaging Abstracts. Leatherhead, Inglaterra: Pira International, 1988.
Citação MLA (8ª ed.)Royal Photographic Society of Great Britain. Imaging Abstracts. Pira International, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.