ROITT, I. m. Pokok-pokok ilmu kekebalan. Gramedia.
Chicago Style (17th ed.) CitationROITT, Ivan m. Pokok-pokok Ilmu Kekebalan. Gramedia.
MLA (8th ed.) CitationROITT, Ivan m. Pokok-pokok Ilmu Kekebalan. Gramedia.
Warning: These citations may not always be 100% accurate.