Institut geologii i razrabotki gor︠i︡uchikh iskopaemykh (Russia) & Nikulin, A. V. (1986). Voprosy metodiki izucheni︠i︡a i osvoeni︠i︡a neft︠i︡anykh zalezheĭ Permskogo Prikamʹ︠i︡a v uslozhnennykh gornogeologicheskikh uslovi︠i︡akh: Sbornik nauchnykh trudov. In-t geologii i razrabotki gor︠i︡uchikh iskopaemykh.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিInstitut geologii i razrabotki gor︠i︡uchikh iskopaemykh (Russia) এবং A. V. Nikulin. Voprosy Metodiki Izucheni︠i︡a I Osvoeni︠i︡a Neft︠i︡anykh Zalezheĭ Permskogo Prikamʹ︠i︡a V Uslozhnennykh Gornogeologicheskikh Uslovi︠i︡akh: Sbornik Nauchnykh Trudov. Moskva: In-t geologii i razrabotki gor︠i︡uchikh iskopaemykh, 1986.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিInstitut geologii i razrabotki gor︠i︡uchikh iskopaemykh (Russia) এবং A. V. Nikulin. Voprosy Metodiki Izucheni︠i︡a I Osvoeni︠i︡a Neft︠i︡anykh Zalezheĭ Permskogo Prikamʹ︠i︡a V Uslozhnennykh Gornogeologicheskikh Uslovi︠i︡akh: Sbornik Nauchnykh Trudov. In-t geologii i razrabotki gor︠i︡uchikh iskopaemykh, 1986.