Eckwright, Gail Z.; Keenan, Lori M.. (1994). Reference services planning in the 90S / editors, Gail Z. Eckwright, Lori M. Keenan. New York :: The Haworth Press,.
Eckwright, Gail Z.; Keenan, Lori M.. Reference services planning in the 90S / editors, Gail Z. Eckwright, Lori M. Keenan. New York :: The Haworth Press,, 1994
Eckwright, Gail Z.; Keenan, Lori M.. Reference services planning in the 90S / editors, Gail Z. Eckwright, Lori M. Keenan. New York :: The Haworth Press,, 1994.