Ikola, Osmo and Joki, Aulis J.. "URALIC". Part 2 The study of languages, edited by Einar Haugen, Berlin, Boston: De Gruyter Mouton, 1972, pp. 1693-1743. https://doi.org/10.1515/9783111684970-017
Ikola, O. & Joki, A. (1972). URALIC. In E. Haugen (Ed.), Part 2 The study of languages (pp. 1693-1743). Berlin, Boston: De Gruyter Mouton. https://doi.org/10.1515/9783111684970-017
Ikola, O. and Joki, A. 1972. URALIC. In: Haugen, E. ed. Part 2 The study of languages. Berlin, Boston: De Gruyter Mouton, pp. 1693-1743. https://doi.org/10.1515/9783111684970-017
Ikola, Osmo and Joki, Aulis J.. "URALIC" In Part 2 The study of languages edited by Einar Haugen, 1693-1743. Berlin, Boston: De Gruyter Mouton, 1972. https://doi.org/10.1515/9783111684970-017
Ikola O, Joki A. URALIC. In: Haugen E (ed.) Part 2 The study of languages. Berlin, Boston: De Gruyter Mouton; 1972. p.1693-1743. https://doi.org/10.1515/9783111684970-017