Tolong jelaskan mengenai Bacaan lanjutan dari Karya rujukan

Malclès, L.-N. (1950) Les sources du travail bibligraphique. 3 vols. in 4. Geneva: Droz, 1950-58 (reissued by Minard, Paris, & French & European Publications, New York, 1966)

Sheehy, E. P. et al., comps. (1976) Guide to Reference Books; 9th ed. Chicago: American Library Association; Supplement, 1980 (began with a guide compiled by A. B. Kroeger, 1917; 3rd-6th eds. by I. G. Mudge; 7th & 8th by C. M. Winchell)

Totok, W. & Weitzel, R. (1972) Handbuch der bibliographischen Nachschlagewerke; 4. Aufl., hrg. von W. Totok, K.-H. Weimann, R. Weitzel. Frankfurt am Main: Klostermann (1st ed. 1954)