Bartel, H. (1977). Vil'gel'm Pik - istorik.
Chicago Style (17th ed.) CitationBartel, Horst. Vil'gel'm Pik - Istorik. 1977.
MLA (8th ed.) CitationBartel, Horst. Vil'gel'm Pik - Istorik. 1977.
Warning: These citations may not always be 100% accurate.