MLA

Horn, Hendrik J. Piet Mondrian's Sufi Friends Louk and Ella Hoyack. Leiden: Foleor Publishers, 2017.

APA

Horn, H. J. (2017). Piet Mondrian's Sufi Friends Louk and Ella Hoyack. Leiden: Foleor Publishers.

Chicago

Horn, Hendrik J. Piet Mondrian's Sufi Friends Louk and Ella Hoyack. Leiden: Foleor Publishers, 2017.