Sudman, S., & Blair, E. (1998). Marketing research: A problem-solving approach. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Sudman, Seymour, agus Edward Blair. Marketing Research: A Problem-solving Approach. Boston: McGraw-Hill, 1998.
Lua MLA (9ú heag.)Sudman, Seymour, agus Edward Blair. Marketing Research: A Problem-solving Approach. McGraw-Hill, 1998.