Orthography
In the International Phonetic Alphabet, ejectives are indicated by writing a stop consonant with a "modifier letter apostrophe" ⟨ʼ⟩. Note that a reversed apostrophe is sometimes used to represent aspiration, as in Armenian linguistics ⟨p‘ t‘ k‘⟩; this usage is obsolete in the IPA. In other transcription traditions, the apostrophe represents palatalization, e.g., ⟨pʼ⟩ = IPA ⟨pʲ⟩.
In alphabets using the Latin script, an IPA-like apostrophe for ejective consonants is common. However, there are other conventions. In Zulu and Xhosa, where the ejection is variable between speakers, plain consonant letters are used: p t k ts tsh kr for /pʼ tʼ kʼ tsʼ tʃʼ kxʼ/. In some conventions for Haida and Hadza, double letters are used: tt kk qq ttl tts for /tʼ kʼ qʼ tɬʼ tsʼ/ (Haida) and zz jj dl gg for /tsʼ tʃʼ cʼ kxʼ/ (Hadza).
Read more about this topic: Ejective Consonant