Dyfyniad APA

Geoffrey, M., David, D., & David, F. (2025). Essentials of Research Design and Methodology. Published by John Wiley & Sons, Inc., Hoboken, New Jersey.

Dyfyniad Arddull Chicago

Geoffrey, Marczyk, DeMatteo David, và Festinger David. Essentials of Research Design and Methodology. Published by John Wiley & Sons, Inc., Hoboken, New Jersey, 2025.

Dyfyniad MLA

Geoffrey, Marczyk, DeMatteo David, và Festinger David. Essentials of Research Design and Methodology. Published by John Wiley & Sons, Inc., Hoboken, New Jersey, 2025.

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