Παραπομπή APA

Walker,Helen M, & Lev,Joseph. (1974). Elementary Statistical Methods (Revised Ed.). Oxford & IBH pub. Com.

Παραπομπή Chicago Style

Walker,Helen M, και Lev,Joseph. Elementary Statistical Methods. Revised Ed. Newdelhi: Oxford & IBH pub. Com, 1974.

Παραπομπή MLA

Walker,Helen M, και Lev,Joseph. Elementary Statistical Methods. Revised Ed. Oxford & IBH pub. Com, 1974.