Bordens, K. S., & Abbott, B. B. (2018). Research design and methods: A process approach (Tenth edition.). McGraw-Hill Education.
Lua i Stíl Chicago (17ú heag.)Bordens, Kenneth S., agus Bruce B. Abbott. Research Design and Methods: A Process Approach. Tenth edition. Dubuque, Iowa: McGraw-Hill Education, 2018.
Lua MLA (9ú heag.)Bordens, Kenneth S., agus Bruce B. Abbott. Research Design and Methods: A Process Approach. Tenth edition. McGraw-Hill Education, 2018.
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