Musa, Abubakar, Dr. Mukaila Adebisi Ijaiya, y Zubairu Umaru Mustapha. 2021. «The Internal Marketing in the Last Decade : A Systematic Review». IROCAMM - International Review Of Communication And Marketing Mix 2 (4):35-45. https://revistascientificas.us.es/index.php/IROCAMM/article/view/16000.