Muller, A. S. (1970). Population studies on the prevalence of rheumatic diseases in Liberia and Nigeria. Drukkerij J.H. Pasmans.
Lua i Stíl Chicago (17ú heag.)Muller, Alexander Samuel. Population Studies on the Prevalence of Rheumatic Diseases in Liberia and Nigeria. 's-Gravenhage: Drukkerij J.H. Pasmans, 1970.
Lua MLA (8ú heag.)Muller, Alexander Samuel. Population Studies on the Prevalence of Rheumatic Diseases in Liberia and Nigeria. Drukkerij J.H. Pasmans, 1970.
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