| Based on the engagement system of appraisal theory, this study examines the use of the "v+that-clause" citation pattern in the academic discourse of education and computer science. The finding reveals differences in citation forms, subject choices, verb types, common patterns, and stance expressions between the discourses of the two disciplines. Educational discourse tends to use integral citations, human subjects, and research verbs, relying on specific patterns such as "integral citation + human subject + discourse verb" to attribute propositions objectively. Overall, it demonstrates a tendency toward dialogic expansion. In contrast, computer science discourse extensively employs non-integral citations, non-human subjects, and research verbs in partial components and complete patterns, primarily contracting the dialogue space to validate cited propositions. The differences in disciplinary citation practices reflect the discourse habits and communication modes within academic communities. Academic writing should consider the citation norms or conventions specific to each discipline. |