@book{87800,
	author = {Palmer, Harold E.,},
	title = {The Principles of Language-Study},
	publisher = {Project Gutenberg,},
	year = {2014},
	address = {Salt Lake City, UT :},
	note = {Release date is 2014-09-25},
	url = {https://www.gutenberg.org/ebooks/46961}
}