Orwig, C. (2009). Adobe Photoshop CS4 how-tos: 100 essential techniques. Adobe Press.
Cita Chicago Style (17a ed.)Orwig, Chris. Adobe Photoshop CS4 How-tos: 100 Essential Techniques. Berkeley, Calif.: Adobe Press, 2009.
Cita MLA (8a ed.)Orwig, Chris. Adobe Photoshop CS4 How-tos: 100 Essential Techniques. Adobe Press, 2009.
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