Department of Ministry.The christian ministry/A challenge. New York: Department of Publication Services, National Council of the Churches of Christ in the USA, 1969.
2.
Holland, J. L.Manual for the Vocational Preference Inventory. Consulting Psychologists Press, Palo Alto, California, 1965.
3.
Holland, J. L.The psychology of vocational choice. Waltham, Massachusetts: Blaisdell Publishing Co., 1966.
4.
Holland, J. L.Jr., Whitney, D. R., Cole, N. S., and Richards, J. M.,
5.
, An occupational classification for research and practice. ACT Research Report No. 29, Iowa City, The American College Testing Program, 1969.
6.
Schuldt, D. L.Men leaving the pastorate: Social and psychological factors involved in career change of United Methodist Ministers. Unpublished Masters thesis, The University of Iowa, 1970.