Protacio, R. M. R. (1991). A comparative study of the entry-level competencies for clerical office occupations as perceived by business employers and secretarial educators in the Philippines. UMI Dissertation Services.

Protacio, Romeo M. Romualdo. A Comparative Study of the Entry-level Competencies for Clerical Office Occupations as Perceived by Business Employers and Secretarial Educators in the Philippines. Ann Arbor, Mich: UMI Dissertation Services, 1991.

Protacio, Romeo M. Romualdo. A Comparative Study of the Entry-level Competencies for Clerical Office Occupations as Perceived by Business Employers and Secretarial Educators in the Philippines. UMI Dissertation Services, 1991.