Citation is an essential practice in scientific publishing. However, it is mandatory that citing the sources in a scientific work is performed in a proper manner. Manipulating citations in research articles is one form of academic research misconduct that violates publication ethics. Citation manipulation simply occurs for the purpose of increasing the number of citations of a researcher or a journal. Unfortunately, there has been a growing trend for this type of misconduct recently and this has not received much attention from the science community. The most effective solution to prevent the growth of such unethical practices is for reputable journals to impose stricter rules on reference evaluation criteria in order to emphasize on the appropriateness of the citations.