BASEM SALEH MUSSALLI, BASSAM FARHAN AWAD AL-RUWAILI, HESHAM SALEH BAJAHZAR, RAED ABDULLAH AL NOWAIS, AYEDH HADI AYEDH ALQAHTANI, MAZEN SAEED ALZAHRANI and ABDULRHMAN AREF ALSALEH, SARAH SAAED ALBISHI, ABDULELAH MAMDOUH AL-HARBI, ADEL ALI ALHARBI, WALEED MANSOUR SAEED ALQAHTANI, MOHAMMED MORAYA ALQAHTANI 2025. SOURCES AND MANAGEMENT OF PREANALYTICAL ERRORS IN CLINICAL LABORATORIES. TPM – Testing, Psychometrics, Methodology in Applied Psychology. 32, S6 (2025): Posted 15 September (Sep. 2025), 2139–2147.