APA

sienko m. j., . (1974). chemical principles. london: mcgraw - hill.

Chicago

sienko michell j, . 1974. chemical principles. london: mcgraw - hill.

Harvard

sienko m. j., . (1974). chemical principles. london: mcgraw - hill.

MLA

sienko michell j, . chemical principles. london: mcgraw - hill. 1974.