@article {RN3,
	title = {An Interactive Genre Within the University Textbook: The Preface},
	journal = {Journal of Technical Writing and Communication},
	volume = {29},
	number = {4},
	year = {1999},
	pages = {409-429},
	doi = {10.2190/105D-FD18-G6KK-UYT2},
	author = {Luz{\'o}n, Mar{\'\i}a Jos{\'e}}
}
