Be wary of random "free PDF" sites. Many contain OCR errors (mixing up "Ambitious" with "Ambiguous") or malware. The "top" PDF is one that is clean, paginated exactly like the 1973 original (321 pages, including the appendix of the survey instrument), and legally obtained.
This article explores the genius of Rokeach’s model, why the original text is a "top" resource, and how you can ethically access and apply its wisdom. rokeach m 1973 the nature of human values pdf top
By measuring the relative ranking of these values, Rokeach demonstrated he could predict behavior, political affiliation, and religious beliefs. Be wary of random "free PDF" sites