Lim-Varona, Linda Ouch! My Knees Hurt/ by Linda Lim-Varona - Caloocan City: Philippine Publishing House, 2014 - page 19 - Vol.55 No.1 (January-February 2014) - Health and Home page 19 Vol.55 No.1 2014 . ISSN: 0115-0839 Dewey Class. No.: BPer.050 / H34