Nek Chand Rock GardenSublime spaces & visionary worlds: built environments of vernacular artists, by Leslie Umberger, Erika Lee Doss, Ruth DeYoung (CON) Kohler, Lisa (CON) Stone, Jane (CON) Bianco. Published by Princeton Architectural Press, 2007. ISBN 1-56898-728-5. Page 319-Page 322.